Solid polymer electrolyte membrane for lithium-ion battery

The invention relates to a solid polymer electrolyte membrane for a lithium-ion battery. The solid polymer electrolyte membrane is characterized by being prepared from polyvinylidene fluoride, cellulose ether, bis-trifluoromethylsulfonylimide N-methyl-N-butyl piperidine (Py14TFSI) and lithium bis(trifluoromethanesulfonyl) imide. The solid polymer electrolyte membrane for the lithium-ion battery has good electrochemical properties, the room-temperature conductivity can reach 2.36*10S.cm, the mechanical property is good, and the lithium iron phosphate/electrolyte membrane/ lithium metal sheet battery assembled by the solid polymer electrolyte membrane has good cycle performance. 本发明涉及种锂离子电池用固态聚合物电解质膜，其特征在于，由聚偏二氟乙烯、纤维素醚、双三氟甲磺酰亚胺基N-甲基-N-丁基哌啶(Py14TFSI)和双三氟甲磺酰亚胺基锂组成。本发明所述锂离子电池用固态聚合物电解质膜有好的电化学性能，其室温电导率高达2.36×10S·cm，且机械性能良好，用该固态聚合物电解质膜组装成的磷酸铁锂/电解质膜/金属锂片的电池有良好的循环性能。